RFR(S) 8235970 [TESTBUG] Remove dependency of sun.tools.jar from RedefineClassHelper

[Alan Bateman]

On 16/12/2019 06:21, Ioi Lam wrote:
> :
>
> The fix is to rewrite RedefineClassHelper to use ClassFileInstaller 
> instead.
This looks okay but just to point out that the jar tool can be obtained 
via ToolProvider, e.g.
    ToolProvider jarTool = ToolProvider.findFirst("jar").orElseThrow();

so RedefineClassHelper, or better still ClassFileInstaller, could use 
that for cases where JAR files need to be created or updated in ways 
that would be easier if the jar tool could be used in the test. Avoids 
using some of the prickly APIs in java.util.zip|jar.

-Alan